Auto 4x4 issue
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Auto 4x4 issue
My auto 4x4 high does not seem to be engaging on my 01 F250 but when I try 4x4 low it works. Any ideas? I was told that there is some sort of speed sensor that may be bad but not sure where to start looking. Any help is appreciated.
Elder User
Joined: Jun 2007
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From: Sandia Park, NM
I think you may be assuming 4 low is working because of the gear change. Your hubs are probably not working at all and you have 2X4 in low range. Switch to 4 low and try turning the half shafts by hand. If they spin free you have a hub issue. If they don't spin, try the same thing in 4 high and see what happens.
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We've had snow covered roads all week which is why I've noticed this. 4x4 low does work for sure and it's not just the gear change. When I get out and turn the hubs to manual, 4x4 high works so I know it's getting power to the front. Shifting from neutral, reverse and back into drive seems to get 4x4 high to work briefly but always disengages after a short period. I will check the shafts tonight when I get home to double check. You would think it's a hub/vacuum issue but since it works in 4x4 low I'm at a loss. My vents all work fine as well.
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Joined: Jun 2002
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From: Panama City, Fl
May be an issue with dried and hardened grease in the hubs. My 2000 had not been used much before I got it and now, with use, it us staying engaged better. The grease may be stopping yours from fully engaging in auto but the manual position forces it to engage.
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Posting Guru
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From: Panama City, Fl
Four wheel drive does not disengage until you select a different option inside. Still sounds like your hubs need work. Also....Don' t use 4 wheel drive on hard dry pavement....it could cause issues.
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